If P(A)=0.5, P(B)=0.3, and A, B are mutually exclusive, then P(A∪B) is: MCQ with Answer and Explanation

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If P(A)=0.5, P(B)=0.3, and A, B are mutually exclusive, then P(A∪B) is:

A. 0.5

B. 0.2

C. 0.8

D. 0.15

Answer: Option C

Solution (By JKSSB Mock Tests)

0.5+0.3=0.8.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The stub of a table contains:

A. Row headings

B. The title

C. Footnotes

D. Column headings

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Correct Answer: Option A

Explanation:
The stub is the left‑most part of a table containing the row captions.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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A table is considered complex when:

A. It has no footnotes

B. It has only one variable

C. It presents data on more than two characteristics

D. It is univariate

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Correct Answer: Option C

Explanation:
Tables showing multiple variables (three or more) are called complex or manifold tables.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Data on attributes is said to be inconsistent if:

A. Any class frequency is greater than N

B. Any class frequency is negative

C. The sum of positive frequencies equals N

D. Both A and B

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Correct Answer: Option D

Explanation:
Frequencies represent counts, so they cannot be negative, nor can any subset exceed the total population (N).

This question belongs to: Accountancy and Statistics Statistics

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